/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.nutch.parse;

import java.io.*;
import java.net.MalformedURLException;

import org.apache.hadoop.io.*;

/* An outgoing link from a page. */
public class Outlink implements Writable {

	private String toUrl;
	private String anchor;

	public Outlink() {
	}

	public Outlink(String toUrl, String anchor) throws MalformedURLException {
		this.toUrl = toUrl;
		if (anchor == null)
			anchor = "";
		this.anchor = anchor;
	}

	public void readFields(DataInput in) throws IOException {
		toUrl = Text.readString(in);
		anchor = Text.readString(in);
	}

	/** Skips over one Outlink in the input. */
	public static void skip(DataInput in) throws IOException {
		Text.skip(in); // skip toUrl
		Text.skip(in); // skip anchor
	}

	public void write(DataOutput out) throws IOException {
		Text.writeString(out, toUrl);
		Text.writeString(out, anchor);
	}

	public static Outlink read(DataInput in) throws IOException {
		Outlink outlink = new Outlink();
		outlink.readFields(in);
		return outlink;
	}

	public String getToUrl() {
		return toUrl;
	}

	public String getAnchor() {
		return anchor;
	}

	public boolean equals(Object o) {
		if (!(o instanceof Outlink))
			return false;
		Outlink other = (Outlink) o;
		return this.toUrl.equals(other.toUrl)
				&& this.anchor.equals(other.anchor);
	}

	public String toString() {
		return "toUrl: " + toUrl + " anchor: " + anchor; // removed "\n".
															// toString,
															// not printLine...
															// WD.
	}

}
